# How do you find the density of a liquid in a manometer?

## How do you find the density of a liquid in a manometer?

P = ρ * g * h , where, P is the pressure the liquid (toothpaste) experiences at height h; ρ (Greek letter rho) is the liquid’s density; and.

## Why low density liquid is used in manometer?

An open tube manometer measures the gauge pressure, p – po = hpg, where p is the pressure being measured, po is the atmospheric pressure, h is the difference in height between the manometric liquid of density p in the two arms. Therefore, for noticeably large h, a laboratory manometer uses a low-density liquid.

What is the density of oil and water?

The density of liquid water is about 1 g/cm3 while that of vegetable oil is 0.93 g/cm3. Because vegetable oil is less dense it floats on top of water.

What units does a manometer use?

Common units are inches of water (in. H2O), pounds per square inch (psi), and millibars (mbar).

### What is the manometer equation?

Manometers. One of the most important classes of pressure gauges applies the property that pressure due to the weight of a fluid of constant density is given by p = hρg.

### Which liquid is used in manometer?

mercury
Most of the case, for gauge pressure measurements, mercury is widely used as manometric fluid because it has non-evaporating quality under normal conditions, sharp meniscus and stable density. For some pressure differences and low-level vacuum, water can be considered as working fluid in the manometer.

Where do we use inverted manometer?

Inverted U-tube manometer is used for measuring pressure differences in liquids. The space above the liquid in the manometer is filled with air which can be admitted or expelled through the tap on the top, in order to adjust the level of the liquid in the manometer.

Is oil less density than water?

Explain that to compare the density of oil and water you need to compare the weight of equal volumes of water and oil. Since the oil is lighter, it is less dense than water and floats on water.

## What liquid is less dense than oil?

Alcohol
Alcohol is less dense than oil. Alcohol molecules are mostly carbon and hydrogen atoms so they are similar to oil. But they also contain an oxygen atom, which makes them a little heavy. For this reason, you might think that alcohol would be more dense than oil.